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Jude says that the volume of a square pyramid with base edges of 12 in and a height of 10 in is equal to the volume of a cylinder with a radius of 6.77 in and a height of 10 in. Jude rounded his answers to the nearest whole numbers. Examine Jude's calculations. Is he correct?

Sagot :

To solve this question, we apply the formulas for the volume of a square pyramid and the cylinder, and verify if they are equal. Since the formulas yield different results, they are different and he is not correct.

Volume of a pyramid:

The volume of a pyramid, with base area [tex]A_b[/tex] and height h, is given by:

[tex]V = \frac{A_bh}{3}[/tex]

In a square pyramid, with edges e, we have that [tex]A_b = e^2[/tex], and then:

[tex]V = \frac{e^2h}{3}[/tex]

Volume of a cylinder:

The volume of a cylinder, with radius r and height h, is given by:

[tex]V = \pi r^2h[/tex]

Pyramid:

Edges of 12 and height of 10, which means that: [tex]e = 12, h = 10[/tex]. Thus

[tex]V_p = \frac{e^2h}{3} = \frac{12^2 \times 10}{3} = 480[/tex]

Cylinder:

Radius of 6.77, height of 10, so:

[tex]V_c = \pi r^2h = \pi(6.77)^2(10) = 1440[/tex]

Is he correct?

Since the volumes are different, he is not correct.

For a similar question, you can check https://brainly.com/question/21334693

Answer:

No, he made a mistake in solving for the volume of the cylinder.

Step-by-step explanation:

I'm taking the test. The reason this is correct is because Jude used the formula V=1/3 pi to the second power multiplied by the height. Which is not correct when solving for the volume of a cylinder. You don't use 1/3. Making the answer he made a mistake solving for the volume of a cylinder.